OC-12

Optical Carrier levels describe a range of digital signals that can be carried on SONET fiber optic network. The number in the Optical Carrier level is directly proportional to the data rate of the bitstream carried by the digital signal.

The general rule for calculating the speed of Optical Carrier lines is when a specification is given as OC-n, that the speed will equal n × 51.8 Mbit/s.